<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>商品分类</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图区 -->
        <el-card>
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addshowCateDialog">添加分类</el-button>
                </el-col>
            </el-row>
            <!-- 表格 -->
            <tree-table class="treetable" :data="cateList" :columns="colunms" :selection-type="false"
                :expand-type="false" show-index index-text="" border>
                <!-- 是否有效 -->
                <template slot="isok" slot-scope="scope">
                    <i class="el-icon-success" v-if="scope.row.cat_deleted===false" style="color: lightgreen;"></i>
                    <i class="el-icon-error" v-else style="color: red;"></i>

                </template>
                <!-- 排序 -->
                <template slot="order" slot-scope="scope">
                    <el-tag size="mini" v-if="scope.row.cat_level===0">1级</el-tag>
                    <el-tag size="mini" type="success" v-else-if="scope.row.cat_level===1">2级</el-tag>
                    <el-tag size="mini" type="warning" v-else>3级</el-tag>
                </template>
                <!-- 操作 -->
                <template slot="opt" slot-scope="scope">
                    <el-button type="primary" icon="el-icon-edit" size="mini" @click="showCateDialog(scope.row.cat_id)">
                        编辑
                    </el-button>
                    <el-button type="danger" icon="el-icon-delete" size="mini"
                        @click="deleteCateDialog(scope.row.cat_id)">删除</el-button>

                </template>
            </tree-table>
            <!-- 分页区 -->
            <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange"
                :current-page="queryInfo.pagenum" :page-sizes="[3,5,10,15]" :page-size="queryInfo.pagesize"
                layout="total, sizes, prev, pager, next, jumper" :total="total">
            </el-pagination>

        </el-card>
        <!-- 添加分类的对话框 -->
        <el-dialog title="添加分类" :visible.sync="addCatedialogVisible" width="50%" @close="addCateDialogClose">
            <!-- 添加分类表单 -->
            <el-form :model="addCateForm" :rules="addCateFormRules" ref="ruleFormRef" label-width="100px">
                <el-form-item label="分类名称" prop="cat_name">
                    <el-input v-model="addCateForm.cat_name"></el-input>
                </el-form-item>
                <el-form-item label="父级分类">
                    <!-- options用于指定数据源 -->
                    <el-cascader v-model="selectedKeys" :options="parentCateList" :props="cascaderProps"
                        @change="prentHandleChange" clearable>
                    </el-cascader>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addCatedialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addCate">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 编辑商品功能 -->
        <el-dialog title="编辑商品名称" :visible.sync="cateEditordialogVisible" width="50%">
            <el-form :model="cateEditruleForm" :rules="cateEditrules" ref="cateEditruleFormRef" label-width="100px">
                <el-form-item label="商品名称" prop="cat_name">
                    <el-input v-model="cateEditruleForm.cat_name"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="cateEditordialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="cateEditsend">确 定</el-button>
            </span>

        </el-dialog>
    </div>
</template>

<script>
    export default {
        name: 'Cate',
        data() {
            return {
                // 查询条件
                queryInfo: {
                    type: 3,
                    pagenum: 1,
                    pagesize: 5
                },

                cateList: [],
                // 总数据条数
                total: 0,
                // 为Table指定列的定义
                colunms: [{
                    label: '分类名称',
                    prop: 'cat_name',
                },
                {
                    label: '是否有效',
                    type: 'template',
                    // 表示自定义模板使用的名称
                    template: 'isok'
                },
                {
                    label: '排序',
                    type: 'template',
                    // 表示自定义模板使用的名称
                    template: 'order'
                },
                {
                    label: '操作',
                    type: 'template',
                    // 表示自定义模板使用的名称
                    template: 'opt'
                },
                ],
                // 控制添加分类对话框显示与隐藏
                addCatedialogVisible: false,
                cateEditordialogVisible: false,
                // 添加分类的表单对象
                addCateForm: {
                    // 将要添加的分类名称
                    cat_name: '',
                    cat_pid: 0,
                    cat_level: 0,
                },
                // 添加父级分类的列表
                parentCateList: [],
                // 选中的父级分类的Id数组
                selectedKeys: [],
                // 添加分类表单验证规则对象
                addCateFormRules: {
                    cat_name: [
                        { required: true, message: '请输入分类名称', trigger: 'blur' },
                    ]
                },
                // 指定级联选择器的配置对象
                cascaderProps: {
                    expandTrigger: 'hover',
                    value: 'cat_id',
                    label: 'cat_name',
                    children: 'children',
                    checkStrictly: true
                },
                cateEditruleForm: {},
                // 验证规则
                cateEditrules: {
                    cat_name: [{ required: true, message: '请输入名称', trigger: 'blur' }]
                }
            }
        },
        created() {
            this.getCateList()
        },
        methods: {
            // 获取商品分类数据
            async getCateList() {
                const { data: res } = await this.$http.get('categories', { params: this.queryInfo })
                if (res.meta.status !== 200) {
                    return this.$message.error('获取数据失败')
                }
                this.cateList = res.data.result
                this.total = res.data.total
            },
            // 监听pagesize改变
            handleSizeChange(newSize) {
                this.queryInfo.pagesize = newSize
                this.getCateList()
            },
            // 监听pagenum改变
            handleCurrentChange(newPage) {
                this.queryInfo.pagenum = newPage
                this.getCateList()
            },
            // 点击按钮，展示添加分类对话框
            addshowCateDialog() {
                // 先获取数据列表
                this.getParentCateList()
                this.addCatedialogVisible = true
            },
            // 获取父级分类的数据列表
            async getParentCateList() {
                const { data: res } = await this.$http.get('categories', { params: { type: 2 } })
                if (res.meta.status !== 200) {
                    this.$message.error('获取父级数据失败!')
                }
                this.parentCateList = res.data
                // console.log(res.data);
            },
            // 选择项发生变化触发这个函数
            prentHandleChange() {
                console.log(this.selectedKeys);
                if (this.selectedKeys.length > 0) {
                    this.addCateForm.cat_pid = this.selectedKeys[this.selectedKeys.length - 1]
                    this.addCateForm.cat_level = this.selectedKeys.length
                    return
                } else {
                    // 父级分类ID
                    this.addCateForm.cat_pid = 0
                    //  当前等级分类赋值
                    this.addCateForm.cat_level = 0
                }
            },
            // 点击按钮添加新的分类
            addCate() {
                this.$refs.ruleFormRef.validate(async valid => {
                    if (!valid) return
                    const { data: res } = await this.$http.post('categories', this.addCateForm)
                    if (res.meta.status !== 201) {
                        this.$message.error('添加分类失败')
                    }
                    this.$message.success('添加分类成功')
                    this.getCateList()
                    this.addCatedialogVisible = false
                })
            },
            // 监听对话框关闭事件重置表单
            addCateDialogClose() {
                this.$refs.ruleFormRef.resetFields()
                this.selectedKeys = []
                this.addCateForm.cat_pid = 0
                this.addCateForm.cat_level = 0
            },
            async showCateDialog(id) {
                const { data: res } = await this.$http.get('categories/' + id)
                if (res.meta.status !== 200) {
                    return this.$message.error('查询分类失败')
                }
                this.cateEditruleForm = res.data

                this.cateEditordialogVisible = true
            },
            cateEditsend() {
                this.$refs.cateEditruleFormRef.validate(async valid => {
                    if (!valid) return

                    const { data: res } = await this.$http.put('categories/' + this.cateEditruleForm.cat_id, {
                        cat_name: this.cateEditruleForm.cat_name
                    })
                    if (res.meta.status !== 200) {
                        return this.$message.error('编辑失败')
                    }
                    this.$message.success('编辑成功')
                    this.getCateList()
                    this.cateEditordialogVisible = false
                })

            },
            async deleteCateDialog(id) {
                const confrimResult = await this.$confirm('此操作将永久删除该分类, 是否继续?', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).catch(err => err)
                console.log(confrimResult);
                if (confrimResult != 'confirm') {
                    return this.$message.info('已取消删除')
                }
                const { data: res } = await this.$http.delete('categories/' + id)

                if (res.meta.status !== 200) {
                    return this.$message.error('删除失败')

                }

                this.$message.success('删除成功')
                this.getCateList()
            }


        },
    }
</script>

<style scoped>
    .treetable {
        margin-top: 15px;
    }

    .el-cascader {
        width: 100%;

    }
</style>